The Belgian First Division A (officially known as Jupiler Pro League) is the top league competition for association football clubs in Belgium. Contested by 16 clubs, it operates on a system of promotion and relegation with the Belgian First Division B. Seasons run from late July to early May, with teams playing 30 matches each in the regular season, and then entering play-offs 1 or play-offs 2 according to their position in the regular season.